SRW2024 + SRW2048 Uplink problem

Hi all.
I have two switches SRW2024 and SRW2048
I had connected on SRW2048 (Switch 1) only PC and on SRW 2024 (Switch2) iscsi SAN, server ESX and a couple of NAS.
I use to uplink port 12 of 2024 and 48 of 2048.
Now in this situation when i connect from my PC (Switch 1) to SERVER ESX and try to upload a datastore the speed is very slow.
If i change the position of my ethernet cable PC from Switch 1 to Switch 2 che connection is perfect, because not pass from the uplink and go direct on the switch.
I think the problem is on the uplink cable, i try to change the cable and the port, use optical miniGb... but the result not change.
For now i don' t have any VLAN, use normal setting default on the switch without trunk or other settings.
Another thing... if i use 2 normal switch without managment... work perfect, the problem is the setting of uplink managment on SRW2024\2048.
Any Idea ?
Thanks to all for any help.

Hello,
What you are describing is quite odd, because when you aren't crossing VLANs everything should really happen at wire speed, there may be a bit of a slowdown because of the extra link, but it should be almost unnoticeable.
A few things I would try are a different cable for the uplink, make sure it is Cat5E, since Cat5 can give you some issues with a gigabit connection. I would also try setting the duplex and port speed manually to 1000/full just to eliminate auto-negotiation as a problem.
I would also try using a different set of ports to connect the two switches if the issue persists.
Just to confirm, right now all of your devices are in the same subnet and VLAN correct?
How much of a speed difference are we talking about here? Can you give some transfer speed numbers for PC to datastore on same switch and when they are on different switches?
Hope some of that helps,
Christopher Ebert - Advanced Network Support Engineer
Cisco Small Business Support Center
*please rate helpful posts*

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30 seconds output rate 0 bits/sec, 0 bytes/sec, 0 packets/sec
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Message Edited by Heathen on 08-14-2008 07:29 AM

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(code-C)(code-M)(code-T)
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paldepind wrote:Maybe this will work: forums.introversion.co.uk/uplink/viewtopic.php?t=38670&highlight=withour+gtk
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Hi there!
I've got a pretty strange problem..
I get connectivety to one of my networks from a Cisco WS-C3560 (according to CDP) that are connected to my Linksys SRW2048 switch port g47.
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In this room I have an other WS-C3560 connceted that should be configured as a trunk and should accept my vlan 170. I can't however get this to work.
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Diagram:
WS-C3560 (un-tagged) -> g47 (un-tagged vlan 170) SRW2048 g48 (trunk, accept vlan 170) -> GigabitEthernet 0/1 (trunk, accept vlan 170) WS-C3560 FastEthernet 0/47 (un-tagged vlan 170) -> computer
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lcli on SRW2048
defiant# sh startup-config
spanning-tree mode rstp
--snip un interesting config --
interface ethernet g48
switchport mode trunk
exit
vlan database
vlan 160-170
exit
interface ethernet g48
switchport trunk allowed vlan add 160
exit
interface ethernet g48
switchport trunk allowed vlan add 161
exit
interface ethernet g48
switchport trunk allowed vlan add 162
exit
interface ethernet g48
switchport trunk allowed vlan add 163
exit
interface ethernet g48
switchport trunk allowed vlan add 164
exit
interface ethernet g48
switchport trunk allowed vlan add 165
exit
interface ethernet g48
switchport trunk allowed vlan add 166
exit
interface ethernet g48
switchport trunk allowed vlan add 167
exit
interface ethernet g48
switchport trunk allowed vlan add 168
exit
interface ethernet g48
switchport trunk allowed vlan add 169
exit
interface range ethernet g(46-47)
switchport access vlan 170
exit
interface ethernet g48
switchport trunk allowed vlan add 170
exit
interface vlan 160
name Managment
exit
interface vlan 161
name 2513
exit
interface vlan 170
name "xyz"
exit
Configuration last WS-C3560:
excelsior#sh run
Building configuration...
Current configuration : 5501 bytes
-- snip --
vlan internal allocation policy ascending
vlan 160
name Server
vlan 161
name 2513
vlan 162
name 2411
vlan 163
name 2412
vlan 164
name 2413
vlan 165
name ATS_192.168.165
vlan 169
vlan 170
name xyz
-- snip --
interface FastEthernet0/47
switchport access vlan 170
switchport mode access
interface FastEthernet0/48
switchport access vlan 170
switchport mode access
interface GigabitEthernet0/1
description "Trunk to "other switch"
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 160-170
switchport mode trunk
-- snip --
end
Anything obvius I've forgotten??

No it doesnt support.
WS-C3560-
24TS-E
Catalyst 3560 24 10/100 + 2 SFP + IPS Image
WS-C3560V2-24TS-E
Catalyst 3560V2 24 10/100 + 2 SFP + IPS (Enhanced) Image
WS-C3560-24TS-S
Catalyst 3560 24 10/100 + 2 SFP IPB Image
WS-C3560V2-24TS-S
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I need to test PVE using my existing SRW2024 to justify purchasing an SG300 version for a new application.
My main uplink is via "g1".
My current settings have all ports in the default (and only) VLAN.
On the Port Settings screen for "g2", I set PVE to "g1".
On the Port Settings screen for "g3", I set PVE to "g2".
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They can't even talk to the switch.
Firmware version 1.2.2b
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The doc just does not seem to indicate anything on using this feature.
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Hi David, I think I see the problem. It looks like your PVE groups are different.
On the Port Settings screen for "g2", I set PVE to "g1".
On the Port Settings screen for "g3", I set PVE to "g2".
How the PVE works is it maps a source port to a destination port to over write the forwarding table. The uplink port "protects" the source port.
You need to set the PVE for g3 to g1 if g1 is your common uplink port.
-Tom
Please mark answered for helpful posts

SRW2024 + SRW2048 Uplink problem

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